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B."],"published-print":{"date-parts":[[2020,1,29]]},"abstract":"<jats:p>When two species interbreed, the resulting hybrid offspring are often sterile, with the heterogametic (e.g. XY) hybrid usually being more severely affected. The prevailing theory for this pattern of sterility evokes divergent changes in separate lineages having maladaptive interactions when placed together in a hybrid individual, with recessive factors on the sex chromosome interacting with dominant factors on the autosomes. The effect of these interactions on gametogenesis should not be uniform across species pairs unless genetic divergence follows the same paths in different lineages or if a specific stage of gametogenesis is more susceptible to detrimental genetic interactions. Here, we perform a detailed cellular characterization of hybrid male sterility across three recently diverged species pairs of<jats:italic>Drosophila<\/jats:italic>. Across all three pairs, sterile hybrid sperm are alive but exhibit rapid nuclear de-condensation with age, with active, but non-differentiated, mitochondria. Surprisingly, all three sets of interspecies hybrids produce half of the number of sperm per round of spermatogenesis, with each sperm cell containing two tails. We identify non-disjunction failures during meiosis I as the likely cause. Thus, errors during meiosis I may be a general phenomenon underlying<jats:italic>Drosophila<\/jats:italic>male sterility, indicating either a heightened sensitivity of this spermatogenic stage to failure, or a basis to sterility other than the prevailing model.<\/jats:p>","DOI":"10.1098\/rspb.2019.2291","type":"journal-article","created":{"date-parts":[[2020,1,22]],"date-time":"2020-01-22T08:06:23Z","timestamp":1579680383000},"page":"20192291","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":12,"title":["A common suite of cellular abnormalities and spermatogenetic errors in sterile hybrid males in<i>Drosophila<\/i>"],"prefix":"10.1098","volume":"287","author":[{"given":"Rachelle L.","family":"Kanippayoor","sequence":"first","affiliation":[{"name":"Western University, London, ON, Canada N6A 5B7"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joshua H. 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